1. He was not known to have any political or extremist links.

2. The extremist group known as Islamic State has killed a number of people in the last few years.

3. He insisted we do that to help protect Ukraine from extremist gangs.

4. Social media companies have been making moves to try and fight extremist materials.

5. Those two demographic factors can add up to a growing number of Islamic extremist recruits.

6. The extremist threat in the region has been growing for years.

7. He had talked to a foreign extremist about his desire to kill a soldier.

8. France is under a state of emergency after multiple Islamic extremist attacks.

9. The attacks build on a rise in extremist violence in Bangladesh this year.

10. Supporters of the extremist group Islamic State celebrated the attack on social media.